68% confidence regions for the MAMPOSStβ_sym(r) (blue) and for the JEIβ_sym(r) (red), for the nine clusters of our sample. The MAMPOSSt solution for all clusters is that obtained for the gOM β(r) model, except for M1931 for which the gT model is used, since it gives a better fit than the gOM model. The dashed horizontal line indicates isotropic orbits. Orbits are radial (respectively tangential) above (respectively below) this line.